Modulation of gluteus medius activity reflects the potential of the muscle to meet the mechanical demands during perturbed walking.
Modulation of gluteus medius activity reflects the potential of the muscle to meet the mechanical demands during perturbed walking.
复制标题
DOI：
10.1038/s41598-018-30139-9
复制
发表时间：
2018-08-03
影响因子：
4.6
通讯作者：
De Groote F
中科院分区：
文献类型：
--
作者：
Afschrift M;Pitto L;Aerts W;van Deursen R;Jonkers I;De Groote F
行走时的中外侧稳定性可通过调整足部位置来控制。臀中肌（GM）的反应性活动在步态周期中被调节。然而，调制背后的机制尚不清楚。我们测量了在步态周期的不同阶段对中外侧平台平移的反应性GM活性和运动学。采用摄动行走的正演模拟来评估摄动和GM响应对步态稳定性的孤立影响。我们发现GM调节侧足位置和防止摇摆时碰撞的潜力在步态周期中有所不同，并解释了观察到的调节。观察到的站立、摆动或联合GM活动的增加导致脚向外放置，因此补偿了步态周期早期扰动引起的稳定性损失。在步态周期的后期，摆动腿的GM活动对平台平移的反应抵消了脚的放置，但防止了摆动脚与站立腿的碰撞。本研究为反应性控制步态稳定性的神经力学提供了新的见解，并提出了一种区分摄动力和反应性肌肉活动对步态稳定性影响的新方法。
Mediolateral stability during walking can be controlled by adjustment of foot placement. Reactive activity of gluteus medius (GM) is modulated during the gait cycle. However, the mechanisms behind the modulation are yet unclear. We measured reactive GM activity and kinematics in response to a mediolateral platform translation during different phases of the gait cycle. Forward simulations of perturbed walking were used to evaluate the isolated effect of the perturbation and the GM response on gait stability. We showed that the potential of GM to adjust lateral foot placement and prevent collisions during swing varies during the gait cycle and explains the observed modulation. The observed increase in stance, swing or combined GM activity causes an outward foot placement and therefore compensates for the loss of stability caused by a perturbation early in the gait cycle. GM activity of the swing leg in response to a platform translation late in the gait cycle counteracts foot placement, but prevents collision of the swing foot with the stance leg. This study provides insights in the neuromechanics of reactive control of gait stability and proposes a novel method to distinguish between the effect of perturbation force and reactive muscle activity on gait stability.
登录
查看更多内容
影响因子：
2.5
作者：
O'Connor, Shawn M.;Kuo, Arthur D.
通讯作者：
Kuo, Arthur D.
影响因子：
2.1
作者：
DAVIS, RB;OUNPUU, S;GAGE, JR
通讯作者：
GAGE, JR
影响因子：
2.4
作者：
Hof, At L.
通讯作者：
Hof, At L.
影响因子：
2.5
作者：
Welch, Torrence D. J.;Ting, Lena H.
通讯作者：
Ting, Lena H.
影响因子：
3.8
作者：
De Groote F;Kinney AL;Rao AV;Fregly BJ
通讯作者：
Fregly BJ